Aspheric VS Double Aspheric Lenses - Which is better ?

[biscusman]

A customer have told me yesterday that he recently tried contact lenses for the first time and was surprised to see his computer screen seems much flatter than what he sees via his specs.
Now he wants to make new specs with Aspheric lenses and wants to know how much difference he can observe/see, between Single Aspheric Lens Vs Double aspheric lens.

His power is -5 and -5.50 with minor cyl and axis i both eyes.

So which would be ideal thing for him? Do he have to pay more for DAS lenses in his case ?


Please Enlighten me.

PS: Customer is Facing Barrel Distortion issue.